diff --git a/app/FileSystem.php b/app/FileSystem.php
index 94a88aa..8661bd3 100644
--- a/app/FileSystem.php
+++ b/app/FileSystem.php
@@ -13,8 +13,16 @@ namespace Sakura;
  */
 class FileSystem
 {
+    /**
+     * Cached copy of the root path.
+     * @var string
+     */
     private static $rootPath = null;
 
+    /**
+     * Resolves the root path.
+     * @return string
+     */
     public static function getRootPath()
     {
         if (self::$rootPath === null) {
@@ -25,11 +33,19 @@ class FileSystem
         return self::$rootPath;
     }
 
+    /**
+     * Fixes a given path to the correct slashes and root.
+     * @return string
+     */
     public static function getPath($path)
     {
         return self::getRootPath() . DIRECTORY_SEPARATOR . self::fixSlashes($path);
     }
 
+    /**
+     * Fixes slashes.
+     * @return string
+     */
     private static function fixSlashes($path)
     {
         return str_replace(['/', '\\'], DIRECTORY_SEPARATOR, $path);